both have a similar ceiling, both will have great careers as first line centermen for their respective teams. RNH might be a little slicker, his skating and agility is off the charts but I find Galchenyuk to be equal to him in every other aspect and has a bit more physicality that RNH lacks. RNH is a pure passer whereas Galchenyuk has the whole package: grit, slick hands, a sniper and can be a very very decent playmaker. Galchenyuk takes it for me, I ****ing love the kid, but it's mighty close.